/*
 * Copyright 2017-2021 Cloudopt
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.cloudopt.next.clickhouse

import net.cloudopt.next.core.Worker.await
import net.cloudopt.next.health.HealthChecksResult
import net.cloudopt.next.health.HealthChecksStatusEnum
import net.cloudopt.next.health.HealthIndicator

/**
 * Used to automatically check the clickhouse status.
 */
class ClickHouseHealthIndicator : HealthIndicator {
    override suspend fun checkHealth(): HealthChecksResult {
        return await {
            val result = HealthChecksResult(data = mutableMapOf())
            try {
                Class.forName("com.zaxxer.hikari.HikariConfig")
                if (ClickHouseManager.hikariDataSource.connection.isClosed) {
                    result.status = HealthChecksStatusEnum.DOWN
                }
            } catch (e: ClassNotFoundException) {
                if (ClickHouseManager.clickHouseDataSource.connection.isClosed) {
                    result.status = HealthChecksStatusEnum.DOWN
                }
            }

            return@await result
        }

    }
}